Most memorable American Idol contestants

Kelly Clarkson: The original American Idol had a successful music career since winning the first season with such hits as "Miss Independent" and "Since U Been Gone." She's currently a judge on NBC's 'The Voice.'

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Kelly Clarkson: The original American Idol had a successful music career since winning the first season with such hits as "Miss Independent" and "Since U Been Gone." She's currently a judge on NBC's 'The Voice.'